Negative energy balance in dairy cows is associated with specific changes in IGF-binding protein expression in the oviduct
Open accessAbstract
Negative energy balance (NEB) during early lactation in dairy cows leads to an altered metabolic state that has major effects on the production of IGF family members. Low IGF-I concentrations are associated with poor fertility and therefore we aimed to determine whether NEB exerts a direct effect on IGF expression in the postpartum oviduct. Multiparous Holstein cows were allocated to two treatments (each n=6) designed using differential feeding and milking regimes to produce either mild NEB (MNEB) or severe NEB (SNEB). Animals were slaughtered in week 2 of lactation when divergent metabolic profiles were evident. Oviducts were collected for RNA analysis by real-time RT-PCR and in situ hybridisation. Quantitative measures in oviduct gene expression were obtained for all members of the IGF family (IGF-I/II, IGF-binding proteins (IGFBP) 1-6 and receptors for IGF types 1 and 2), insulin A/B, GH, glucocorticoid and oestrogen alpha/beta. Expression of IGFBP-2 and IGFBP-6 (both of which have a high affinity for IGF-II) was decreased in SNEB relative to MNEB (P<0.05). No other gene was altered by NEB, but IGF-II, IGFBP-3, IGFBP-5 and IGFBP-6 all showed differential expression in different regions of the oviduct. These results indicate that, in addition to low circulating IGF-I after calving, NEB may also influence IGF availability in the oviduct indirectly through changes in specific IGFBP expression. It is possible that the predicted increased signalling by IGF-II may perturb embryo development, contributing to the high rates of embryonic mortality in dairy cows.
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BHBA and NEFA serve as indicators of body fat mobilization and negative energy balance in adult dairy cattle and are interpreted similarly in calves.
“these parameters serve as indicators of body fat mobilization and negative energy balance in adult dairy cattle and are interpreted similarly in calves”
From A randomized controlled trial investigating the effect of transport duration and age at transport on surplus dairy calves: Part II. Impact on hematological variables. (2023) · cites this paper as Fenwick et al., 2008
The Results section (“Metabolic and hormonal effects of NEB”) reports elevated NEFA and β-hydroxybutyrate (BHB, also called BHBA) in cows with severe negative energy balance and describes the blood metabolite data as evidence of body tissue mobilisation. The study examined postpartum adult dairy cows, not calves, so it does not support interpreting these measures similarly in calves. (LLM, conf=0.88)
Experimental — accuracy not yet measuredThe relationship between energy balance and NEFA and BHBA has primarily been studied in adult dairy cattle, in which both increase as a result of catabolism and fat mobilization.
“The relationship between energy balance and NEFA and BHBA has primarily been studied in adult dairy cattle, in which both increase as a result of catabolism and fat mobilization”
From A randomized controlled trial investigating the effect of transport duration and age at transport on surplus dairy calves: Part II. Impact on hematological variables. (2023) · cites this paper as Fenwick et al., 2008
The Results (Metabolic and hormonal effects of NEB; page not provided) report that cows with severe negative energy balance had greater body-tissue mobilisation and elevated NEFA and BHB compared with cows with mild negative energy balance. Materials and Methods (Animals and tissue collection; page not provided) identifies the cows as multiparous. The paper does not establish that this relationship has primarily been studied in adult dairy cattle rather than other populations. (LLM, conf=0.85)
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Cites
American Journal of Veterinary Research.
(1940) · PubMed · Cited by 5,371 · see citing works
Insulin-Like Growth Factors and Their Binding Proteins: Biological Actions*
Jones, J. I. W., & Clemmons, D. R. (1995) · Endocrine Reviews · doi:10.1210/edrv-16-1-3 · Cited by 4,488 · see citing works
Bauman, D. E., & Currie, W. B. (1980) · Journal of Dairy Science · doi:10.3168/jds.s0022-0302(80)83111-0 · Cited by 1,871 · see citing works
Nutritional Regulation of the Insulin-Like Growth Factors*
Thissen, J., Ketelslegers, J., & Underwood, L. E. (1994) · Endocrine Reviews · doi:10.1210/edrv-15-1-80 · Cited by 1,578 · see citing works
Defining postpartum uterine disease in cattle
Sheldon, I. M., Lewis, G. S., LeBlanc, S. J., et al. (2005) · Theriogenology · doi:10.1016/j.theriogenology.2005.08.021 · Cited by 1,382 · see citing works
Effects of energy balance on follicular development and first ovulation in postpartum dairy cows
Beam, S. W., & Butler, W. R. (2019) · Bioscientifica Proceedings · doi:10.1530/biosciprocs.4.032 · Cited by 524 · see citing works
Insulin-like growth factor binding proteins and their role in controlling IGF actions
Clemmons, D. R. (1997) · Cytokine & Growth Factor Reviews · doi:10.1016/s1359-6101(96)00053-6 · Cited by 509 · see citing works
Influence of negative energy balance on cyclicity and fertility in the high producing dairy cow
Wathes, D. C., Fenwick, M. A., Cheng, Z., Bourne, N., Llewellyn, S., Morris, D. G., Kenny, D. A., Murphy, J. B., & Fitzpatrick, R. (2007) · Theriogenology · doi:10.1016/j.theriogenology.2007.04.006 · Cited by 418 · see citing works
Self-citationLonergan, P. (2003) · Biology of Reproduction · doi:10.1095/biolreprod.103.018168 · Cited by 306 · see citing works
Endocrine regulation of fetal growth
Fowden, A. L. (1995) · Reproduction Fertility and Development · doi:10.1071/rd9950351 · Cited by 278 · see citing works
Influence of in vitro systems on embryo survival and fetal development in cattle
Farin, P. W., Crosier, A. E., & Farin, C. E. (2001) · Theriogenology · doi:10.1016/s0093-691x(00)00452-0 · Cited by 243 · see citing works
Zapf, J., & Froesch, E. R. (2008) · Hormone Research · doi:10.1159/000180551 · Cited by 236 · see citing works
Murphy, L. J., & Friesen, H. G. (1988) · Endocrinology · doi:10.1210/endo-122-1-325 · Cited by 235 · see citing works
Patton, J., Kenny, D. A., McNamara, S., et al. (2007) · Journal of Dairy Science · doi:10.3168/jds.s0022-0302(07)71547-3 · Cited by 234 · see citing works
Self-citationIn vitro culture and embryo metabolism of cattle and sheep embryos — a decade of achievement
Thompson, J. G. (2000) · Animal Reproduction Science · doi:10.1016/s0378-4320(00)00096-8 · Cited by 196 · see citing works
Vicini, J. L., BUONOMO, F. C., Veenhuizen, J. J., et al. (1991) · Journal of Nutrition · doi:10.1093/jn/121.10.1656 · Cited by 178 · see citing works
Secreted Proteins of the Oviduct
Buhi, W. C., Alvarez, I. M., & Kouba, A. J. (2000) · Cells Tissues Organs · doi:10.1159/000016731 · Cited by 178 · see citing works
Bar, R. S., Boes, M. A., Clemmons, D. R., et al. (1990) · Endocrinology · doi:10.1210/endo-127-1-497 · Cited by 175 · see citing works
Uterus of the cow after parturition: involutional changes.
Gier, H. T., & Marion, G. B. (1968) · PubMed · Cited by 171 · see citing works
Changes in the Somatotrophic Axis Associated with the Initiation of Lactation
Lucy, M. C., Jiang, H., & Kobayashi, Y. (2001) · Journal of Dairy Science · doi:10.3168/jds.s0022-0302(01)70205-6 · Cited by 151 · see citing works
Taylor, V., Cheng, Z., Pushpakumara, P. G. A., et al. (2004) · Veterinary Record · doi:10.1136/vr.155.19.583 · Cited by 148 · see citing works
Fenwick, M. A., Fitzpatrick, R., Kenny, D. A., et al. (2006) · Domestic Animal Endocrinology · doi:10.1016/j.domaniend.2006.10.002 · Cited by 145 · see citing works
Self-citationMonitoring gene expression changes in bovine oviduct epithelial cells during the oestrous cycle
Bauersachs, S., Rehfeld, S., Ulbrich, S. E., Mallok, S., Prelle, K., Wenigerkind, H., Einspanier, R., Blum, H., & Wolf, E. (2004) · Journal of Molecular Endocrinology · doi:10.1677/jme.0.0320449 · Cited by 137 · see citing works
Patton, J., Kenny, D. A., Mee, J. F., O’Mara, F. P., Wathes, D. C., Cook, M. D., & Murphy, J. J. (2006) · Journal of Dairy Science · doi:10.3168/jds.s0022-0302(06)72215-9 · Cited by 136 · see citing works
Self-citationGutiérrez‐Adán, A., Lonergan, P., Rizos, D. V., Ward, F., Boland, M. P., Pintado, B., & de la Fuente, J. (2001) · Theriogenology · doi:10.1016/s0093-691x(01)00471-x · Cited by 132 · see citing works
Nutritional effects on resumption of ovarian cyclicity and conception rate in postpartum dairy cows
Butler, W. R. (2001) · BSAP Occasional Publication · doi:10.1017/s0263967x00033644 · Cited by 119 · see citing works
The bovine oviduct and its role in reproduction: a review of the literature.
Ellington, J. E. (1991) · PubMed · Cited by 114 · see citing works
Wathes, D. C., Taylor, V., Cheng, Z., et al. (2019) · Bioscientifica Proceedings · doi:10.1530/biosciprocs.5.017 · Cited by 111 · see citing works
Self-citationAndersen, C. Y. (2002) · Journal of Endocrinology · doi:10.1677/joe.0.1730211 · Cited by 110 · see citing works
IGFBP-6 five years on; not so ‘forgotten’?
Bach, L. A. (2005) · Growth Hormone & IGF Research · doi:10.1016/j.ghir.2005.04.001 · Cited by 104 · see citing works
Insulin-Like Growth Factor Binding Protein-6: The “Forgotten” Binding Protein?
Bach, L. A. (1999) · Hormone and Metabolic Research · doi:10.1055/s-2007-978723 · Cited by 103 · see citing works
Leroy, J. L. M. R., Vanholder, T., OPSOMER, G., et al. (2006) · Reproduction in Domestic Animals · doi:10.1111/j.1439-0531.2006.00650.x · Cited by 102 · see citing works
Boilard, M., Reyes‐Moreno, C., Lachance, C., et al. (2004) · Biology of Reproduction · doi:10.1095/biolreprod.103.026849 · Cited by 97 · see citing works
In vivo regulation of growth hormone-stimulated gene transcription by STAT5b
Woelfle, J., & Rotwein, P. S. (2004) · American Journal of Physiology-Endocrinology and Metabolism · doi:10.1152/ajpendo.00389.2003 · Cited by 93 · see citing works
Perks, C. M., Denning‐Kendall, P. A., Gilmour, R. S., et al. (1995) · Endocrinology · doi:10.1210/endo.136.12.7588270 · Cited by 93 · see citing works
Stevenson, K. R., Gilmour, R. S., & Wathes, D. C. (1994) · Endocrinology · doi:10.1210/endo.134.4.8137728 · Cited by 85 · see citing works
Self-citationHohn, H., Linke, M., & Denker, H. (2000) · Molecular Reproduction and Development · doi:10.1002/1098-2795(200010)57:2 · Cited by 80 · see citing works
Radcliff, R. P., McCormack, B. L., Crooker, B. A., et al. (2003) · Journal of Dairy Science · doi:10.3168/jds.s0022-0302(03)74000-4 · Cited by 79 · see citing works
Winger, Q. A., Rios, P. D. L., Han, V. K. M., et al. (1997) · Biology of Reproduction · doi:10.1095/biolreprod56.6.1415 · Cited by 78 · see citing works
Suboptimal in vitro culture conditions: an epigenetic origin of long‐term health effects
Fernández‐González, R., Ramírez, M. Á., Bilbao, A., de Fonseca, F. R., & Gutiérrez‐Adán, A. (2007) · Molecular Reproduction and Development · doi:10.1002/mrd.20746 · Cited by 76 · see citing works
IGF paracrine and autocrine interactions between conceptus and oviduct
Watson, A. J., Westhusin, M. E., & Winger, Q. (2019) · Bioscientifica Proceedings · doi:10.1530/biosciprocs.4.023 · Cited by 66 · see citing works
Pfeifer, T. L., & Chegini, N. (1994) · Biology of Reproduction · doi:10.1095/biolreprod50.2.281 · Cited by 62 · see citing works
Physiology of the Graafian Follicle and Ovulation
Hunter, R. H. F. (2003) · Cited by 60 · see citing works
Pushpakumara, P., Robinson, R. S., Demmers, K., et al. (2002) · Reproduction · doi:10.1530/rep.0.1230859 · Cited by 60 · see citing works
Expression of insulin-like growth factor 1 (IGF-1) in the bovine oviduct during the oestrous cycle
Schmidt, A., Einspanier, R., Amselgruber, W. M., et al. (2009) · Experimental and Clinical Endocrinology & Diabetes · doi:10.1055/s-0029-1211305 · Cited by 55 · see citing works
Lai, Y.-M., Wang, H.-P., Lee, C. L., et al. (1996) · Human Reproduction · doi:10.1093/oxfordjournals.humrep.a019372 · Cited by 55 · see citing works
Llewellyn, S., Fitzpatrick, R., Kenny, D. A., et al. (2007) · Reproduction · doi:10.1530/rep-06-0122 · Cited by 53 · see citing works
Self-citationOsgerby, J., Wathes, D. C., Howard, D. J., & Gadd, T. (2004) · Journal of Endocrinology · doi:10.1677/joe.0.1820089 · Cited by 50 · see citing works
Self-citationIdentification and Content of Insulin-like Growth Factors in Porcine Oviductal Fluid1
Wiseman, D. L., Henricks, D. M., Eberhardt, D. M., et al. (1992) · Biology of Reproduction · doi:10.1095/biolreprod47.1.126 · Cited by 50 · see citing works
Chen, C., Hu, C., Wang, C. H., Hung, C.-M., Wu, H., Choo, K., & Cheng, W. T. K. (1999) · Molecular Reproduction and Development · doi:10.1002/(sici)1098-2795(199911)54:3 · Cited by 49 · see citing works
McMullen, S., Osgerby, J., Milne, J. S., Wallace, J. M., & Wathes, D. C. (2004) · Placenta · doi:10.1016/j.placenta.2004.04.010 · Cited by 48 · see citing works
Self-citationCarlsson, B., Hillensjø, T., Nilsson, A., et al. (1993) · Endocrinology · doi:10.1210/endo.133.5.8404650 · Cited by 45 · see citing works
Murray, M. K. (1995) · Biology of Reproduction · doi:10.1095/biolreprod53.3.653 · Cited by 45 · see citing works
Stevenson, K. R., & Wathes, D. C. (1996) · Reproduction · doi:10.1530/jrf.0.1080031 · Cited by 43 · see citing works
Self-citationPerks, C. M. (1995) · Endocrinology · doi:10.1210/en.136.12.5266 · Cited by 37 · see citing works
Neuvians, T. P., Pfaffl, M. W., Berisha, B., et al. (2003) · Domestic Animal Endocrinology · doi:10.1016/j.domaniend.2003.08.002 · Cited by 35 · see citing works
Horst, R. L., Reinhardt, T. A., Goff, J. P., Koszewski, N. J., & Napoli, J. L. (1995) · Archives of Biochemistry and Biophysics · doi:10.1006/abbi.1995.1457 · Cited by 33 · see citing works
First lactation ovarian function in dairy heifers in relation to prepubertal metabolic profiles
Taylor, V., Beever, D. E., Bryant, M., et al. (2004) · Journal of Endocrinology · doi:10.1677/joe.0.1800063 · Cited by 33 · see citing works
Stevenson, K. R. (1994) · Endocrinology · doi:10.1210/en.134.4.1655 · Cited by 30 · see citing works
Xia, P., Han, V. K. M., Viuff, D., et al. (1996) · Journal of Endocrinology · doi:10.1677/joe.0.1490041 · Cited by 29 · see citing works
Osgerby, J., Gadd, T., & Wathes, D. C. (1999) · Journal of Endocrinology · doi:10.1677/joe.0.1620279 · Cited by 28 · see citing works
Self-citationPerry, V. E. A., Norman, S. T., Daniel, R. C. W., et al. (2002) · Animal Reproduction Science · doi:10.1016/s0378-4320(02)00069-6 · Cited by 28 · see citing works
Resumption of reproductive activity in the early postpartum period of cows
ROCHE, J. F., & Diskin, M. G. (2001) · BSAP Occasional Publication · doi:10.1017/s0263967x00033577 · Cited by 28 · see citing works
The IGF system in neuroblastoma xenografts: focus on IGF-binding protein-6
Grellier, P., Berrebi, D. D., Peuchmaur, M. M., et al. (2002) · Journal of Endocrinology · doi:10.1677/joe.0.1720467 · Cited by 27 · see citing works
Identification of insulin-like growth factor binding proteins in human oviduct
Giudice, L. C., Dsupin, B. A., Irwin, J. C., et al. (1992) · Fertility and Sterility · doi:10.1016/s0015-0282(16)54833-x · Cited by 24 · see citing works
Pershing, R. A., Lucy, M. C., Thatcher, W. W., et al. (2002) · Journal of Dairy Science · doi:10.3168/jds.s0022-0302(02)74414-7 · Cited by 23 · see citing works
Diehlmann, A., Ida, N., Weggen, S., Grünberg, J., Haass, C., Masters, C. L., Bayer, T. A., & Beyreuther, K. T. (1999) · Journal of Neuroscience Research · doi:10.1002/(sici)1097-4547(19990515)56:4 · Cited by 21 · see citing works
Structural Characterization of the Rat Insulin-like Growth Factor Binding Protein-6 Gene
Zhu, X. G., LING, N. C., & Shimasaki, S. (1993) · Biochemical and Biophysical Research Communications · doi:10.1006/bbrc.1993.1350 · Cited by 21 · see citing works
Kühl, N. M., Hoekstra, D., Vries, H. D., et al. (2003) · Glia · doi:10.1002/glia.10263 · Cited by 21 · see citing works
Carlsson, B.-M. (1993) · Endocrinology · doi:10.1210/en.133.5.2031 · Cited by 20 · see citing works
Merris, V. V., Meyer, E., Duchateau, L., Blum, J. W., & Burvenich, C. (2004) · Journal of Dairy Science · doi:10.3168/jds.s0022-0302(04)73243-9 · Cited by 19 · see citing works
Deciliation in the Puerperal Fallopian Tube
Seki, K., Rawson, J. M. R., Eddy, C. A., et al. (1978) · Fertility and Sterility · doi:10.1016/s0015-0282(16)43042-6 · Cited by 18 · see citing works
Gadd, T., Osgerby, J., & Wathes, D. C. (2002) · Biology of Reproduction · doi:10.1095/biolreprod67.6.1756 · Cited by 17 · see citing works
Self-citationTiemann, U., & Hansen, P. J. (1995) · In Vitro Cellular & Developmental Biology - Animal · doi:10.1007/bf02634318 · Cited by 15 · see citing works
Gabler, C., Plath-Gabler, A., Einspanier, A., et al. (1998) · Biology of Reproduction · doi:10.1095/biolreprod58.6.1451 · Cited by 13 · see citing works
Higashi, Y., Takenaka, A., Takahashi, S., & Noguchi, T. (1996) · British Journal Of Nutrition · doi:10.1079/bjn19960188 · Cited by 12 · see citing works
Morphological changes in the ewe uterine tube (oviduct) epithelium during puerperium.
Cigánková, V., Krajnicáková, H., Kokardová, M., et al. (1996) · PubMed · Cited by 10 · see citing works
Davies, S., Richardson, M. C., Anthony, F. W., et al. (2004) · Molecular Human Reproduction · doi:10.1093/molehr/gah124 · Cited by 9 · see citing works
Qiu, X., Sun, X., Christow, A., et al. (2003) · Fertility and Sterility · doi:10.1016/s0015-0282(03)00781-7 · Cited by 8 · see citing works
Fine Structural Changes of the Porcine Uterine Tube Epithelium During Early and Late Pregnancy
Nayak, R. K., Albert, E. N., & Kassira, W. N. (1976) · American Journal of Veterinary Research · doi:10.2460/ajvr.1976.37.12.1421 · Cited by 8 · see citing works
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Research works printed but not linked: 1
- Taylor VJ, Beever DE & Wathes DC 2003 Physiological adaptations to milk production that affect fertility in high yielding dairy cows. British Society of Animal Science Occasional Publication, vol 29, pp. 37–71. Nottingham, UK: Nottingham University Press.
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Evaluating potential biomarkers of health and performance in veal calves
Marcato, F., van den Brand, H., Kemp, B., & van Reenen, K. (2018) · Frontiers in Veterinary Science · doi:10.3389/fvets.2018.00133 · Cited by 76 · see citing works
Goetz, H. M., Creutzinger, K. C., Kelton, D. F., Costa, J. H. C., Winder, C. B., Gomez, D. E., & Renaud, D. L. (2023) · Journal of Dairy Science · doi:10.3168/jds.2022-22367 · Cited by 20 · see citing works
- Authors
- Fenwick, M. A., Llewellyn, S., Fitzpatrick, R., Kenny, D. A., Murphy, J. J., Patton, J., & Wathes, D. C.
- Affiliations
- Royal Veterinary College (GB)
- University College Dublin (IE)
- Corresponding author
- Wathes, D C
- Venue
- Reproduction
- Publisher
- Oxford University Press (OUP)
- Published
- 2008-01-01
- Volume
- 135
- Issue
- 1
- Pages
- 63-75
- ISSN
- 1470-1626 (ISSN-L)
- 1741-7899
- PMC
- PMC2756008
- OpenAlex
- W2054923638
- Cited by
- 122
- References
- 80
- Citations by year
- 2026: 3 · 2025: 5 · 2024: 6 · 2023: 3 · 2022: 11 · 2021: 9 · 2020: 6 · 2019: 7 · 2018: 15 · 2017: 7 · 2016: 8 · 2015: 3 · 2014: 4 · 2013: 5 · 2012: 14
- FWCI
- 2.68
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Reproduction (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- ARAN (University of Galway Research Repository) (Ollscoil na Gaillimhe – University of Galway) (acceptedVersion, public-domain)
- RVC Research Online (Royal Veterinary College) (submittedVersion, cc-by)
- Arrow@dit (Dublin Institute of Technology) (submittedVersion)
- ARAN (University of Galway Research Repository) (Ollscoil na Gaillimhe – University of Galway) (submittedVersion, cc-by-nc-nd)
- ARAN (University of Galway Research Repository) (Ollscoil na Gaillimhe – University of Galway) (submittedVersion, cc-by-nc)
- Research Repository UCD (University College Dublin) (cc-by-nc)
- Funders
- Wellcome Trust (072315)
- Teagasc
- Topics
- Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Growth Hormone and Insulin-like Growth Factors
- Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Reproductive Physiology in Livestock
- Health Sciences › Veterinary › Small Animals › Animal health and immunology
- Keywords
- negative energy balance, dairy cattle, IGF binding proteins, oviduct, insulin-like growth factor II, insulin-like growth factor I, IGFBP-2, IGFBP-6, early lactation, postpartum metabolism, embryonic development, embryonic mortality, IGF receptors, insulin, growth hormone, glucocorticoids, estrogen
- MeSH terms
- Animals, Autoradiography, Cattle, Dairying, Energy Metabolism, Fallopian Tubes, Female, Fetal Death, Insulin-Like Growth Factor I, Insulin-Like Growth Factor II, Lactation, Pregnancy, Receptors, Somatotropin, RNA, Messenger, Signal Transduction, Gene Expression, In Situ Hybridization, Insulin-Like Growth Factor Binding Proteins, Insulin-Like Growth Factor Binding Protein 2, Insulin-Like Growth Factor Binding Protein 6, Reverse Transcriptase Polymerase Chain Reaction
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